Image processing systems including plurality of image sensors and electronic devices including the same

ABSTRACT

An image processing system may include a first image sensor, a second image sensor, and an image processing device. The image processing device may be configured to obtain a first image and a second image by respectively processing the first image data and the second image data. The image processing device may output an image based on the first image when a zoom factor of the output image is lower than a first reference value, generate a correction image by correcting locations of second reference coordinates of the second image based on first reference coordinates of the first image when the zoom factor of the output image is between the first reference value and the second reference value, and may output an image based on the second image when the zoom factor exceeds the second reference value.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority under 35 U.S.C. § 119 to Korean PatentApplication No. 10-2016-0128474 filed Oct. 5, 2016 in the KoreanIntellectual Property Office, the entire contents of which areincorporated by reference herein in their entirety.

TECHNICAL FILED

Embodiments of the inventive concepts relate to an electronic devices,and more particularly, to image processing systems and electronicdevices including the same.

DESCRIPTION OF THE RELATED ART

Digital image capturing devices, such as a digital camera and a digitalcamcorder, may obtain images using an image sensor. A smartphone and/ora personal computer (PC) may obtain an image using an image sensor. Animage sensor may include a charge coupled device (CCD) and/or a CMOSimage sensor (CIS).

The image sensor may include a plurality of image sensor pixels. Theimage sensor pixels may be arranged in the form of an array. The imagesensor pixels may output analog signals based on light incident thereon.The analog signals output from the image sensor pixels may be convertedinto digital signals and the digital signals may be stored as image dataafter being digitized.

SUMMARY

Some embodiments of the inventive concepts may provide image processingsystems that may reduce electric energy consumed in a process ofcorrecting images and electronic devices including the same.

According to some embodiments of the inventive concepts, imageprocessing systems may be provided. An image processing system mayinclude a first image sensor, a second image sensor, and an imageprocessing device. The first image sensor may be configured to obtainfirst image data of a subject. The second image sensor may be configuredto obtain second image data of all or part of the subject. The imageprocessing device may be configured to perform operations includingobtaining a first image and a second image by respectively processingthe first image data and the second image data. The operations mayincluding generating a correction image by correcting locations ofsecond reference coordinates of the second image based on firstreference coordinates of the first image, when a zoom factor is betweena first reference value and a second reference value. The operations mayinclude outputting an output image based on the second image when thezoom factor exceeds the second reference value, based on the correctionimage when the zoom factor is between the first reference value and thesecond reference value, and based on the first image when the zoomfactor is less than the first reference value.

According to some embodiments of the inventive concepts, electronicdevices may be provided. An electronic device may include a first imagesensor, a second image sensor, and an image processing device. The firstimage sensor may be configured to obtain first image data of a subject.The second image sensor may be configured to obtain second image data ofthe subject. The image processing device may be configured to performoperations including obtaining a first image and a second image byrespectively processing the first image data and the second image data.The operations may include outputting a correction image that isgenerated by correcting locations of second reference coordinates of thesecond image based on first reference coordinates of the first imageduring a first time, when the first image data is not received. Theoperations may include outputting an output image based on the secondimage after the first time without correcting the locations of secondreference coordinates of the second image based on first referencecoordinates of the first image.

According to some embodiments of the inventive concepts, imageprocessing systems may be provided. An image processing system mayinclude a first image sensor configured to obtain first image data of asubject and a second image sensor physically separated from the firstimage sensor by a distance. The second image sensor may be configured toobtain second image data of the subject. The image processing system mayinclude a first image processor coupled to the first image sensor andconfigured produce a first image based on the first image data and asecond image processor coupled to the second image sensor and configuredproduce a second image based on the second image data. The imageprocessing system may include a correction circuit that may beconfigured to receive the first and second images and to produce acorrected image by transforming coordinates of the second image based onreference coordinates of the first image. The image processing systemmay include a controller that may be configured to control the imageprocessing system to enable the correction circuit and output thecorrected image as an output image in a first time and then to disablethe correction circuit and output the second image as the output imagein a second time.

BRIEF DESCRIPTION OF THE DRAWINGS

The inventive concepts will become more clearly understood in view ofthe detailed description and the accompanying drawings, wherein likereference numerals may refer to like parts throughout the variousfigures unless otherwise specified.

FIG. 1 is a block diagram illustrating an image processing systemaccording to some embodiments of the inventive concepts.

FIG. 2 is a conceptual block diagram illustrating operations of methodsin which a subject is photographed by first and second image sensors,according to some embodiments of the inventive concepts.

FIG. 3 is a flowchart illustrating operations of methods of operatingthe image processing system of FIG. 1, according to some embodiments ofthe inventive concepts.

FIG. 4 is a conceptual block diagram illustrating operations of methodsin which a subject is photographed by first and second image sensors,according to some embodiments of the inventive concepts.

FIG. 5 is a conceptual block diagram illustrating operations of methodsof generating an output image at the image processing system of FIG. 1when a zoom factor of a subject included in the output image increases,according to some embodiments of the inventive concepts.

FIG. 6 is a conceptual block diagram illustrating operations of methodsof generating an output image at the image processing system of FIG. 1when a zoom factor of a subject included in the output image decreases,according to some embodiments of the inventive concepts.

FIG. 7 is a flowchart illustrating operations of methods of enlarging asubject included in an image at the image processing system of FIG. 1,according to some embodiments of the inventive concepts.

FIG. 8 is a block diagram illustrating an image processing system,according to some embodiments of the inventive concepts.

FIG. 9 is a conceptual block diagram illustrating operations of methodsin which a subject is photographed by first to third image sensors,according to some embodiments of the inventive concepts.

FIG. 10 is a conceptual flowchart diagram illustrating operations ofmethods in which the image processing system of FIG. 8 corrects a firstimage, according to some embodiments of the inventive concepts.

FIG. 11 is a conceptual flowchart diagram illustrating operations ofmethods in which the image processing system of FIG. 8 corrects a secondimage, according to some embodiments of the inventive concepts.

FIG. 12 is a conceptual flowchart diagram illustrating operations ofmethods in which an output image is generated by the image processingsystem of FIG. 8, according to some embodiments of the inventiveconcepts.

FIG. 13 is a conceptual block diagram illustrating operations of imagephotographing methods of third image sensor methods in the imageprocessing system of FIG. 8, according to some embodiments of theinventive concepts.

FIG. 14 is a conceptual flowchart diagram illustrating operations ofmethods in which the image processing system of FIG. 8 generates anoutput image, according to some embodiments of the inventive concepts.

FIG. 15 is a block diagram illustrating an electronic device includingan image processing system, according to some embodiments of theinventive concepts.

DETAILED DESCRIPTION

The inventive concepts will now be described more fully hereinafter withreference to the accompanying drawings, in which exemplary embodimentsof the inventive concepts are shown. The inventive concepts and methodsof achieving them will be apparent from the following exemplaryembodiments that will be described in more detail with reference to theaccompanying drawings. The embodiments of the inventive concepts may,however, be embodied in different forms and should not be constructed aslimited to the embodiments set forth herein. Rather, these embodimentsare provided so that this disclosure will be thorough and complete, andwill fully convey the scope of the inventive concepts to those skilledin the art.

As used herein, the singular terms “a,” “an” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise. It will be understood that when an element is referred to asbeing “connected” or “coupled” to another element, it may be directlyconnected or coupled to the other element or intervening elements may bepresent. As used herein, the term “and/or” includes any and allcombinations of one or more of the associated listed items. It will befurther understood that the terms “comprises”, “comprising,”, “includes”and/or “including”, when used herein, specify the presence of statedfeatures, integers, steps, operations, elements, and/or components, butdo not preclude the presence or addition of one or more other features,integers, steps, operations, elements, components, and/or groupsthereof.

Similarly, it will be understood that when an element such as a layer,region or substrate is referred to as being “connected to” or “on”another element, it can be directly connected to or on the other elementor intervening elements may be present. In contrast, the term “directly”means that there are no intervening elements. Additionally, embodimentsthat are described in the detailed description may be described withsectional views as ideal exemplary views of the inventive concepts.Accordingly, shapes of the exemplary views may be modified according tomanufacturing techniques and/or allowable errors. Therefore, theembodiments of the inventive concepts are not limited to the specificshape illustrated in the exemplary views, but may include other shapesthat may be created according to manufacturing processes.

Embodiments of the present inventive concepts explained and illustratedherein may include their complementary counterparts. The same referencenumerals or the same reference designators denote the same elementsthroughout the specification.

FIG. 1 is a block diagram illustrating an image processing system,according to some embodiments of the inventive concepts. An imageprocessing system 100 may be included in various electronic devices. Forexample, the image processing system 100 may be included in at least oneof a personal computer, a desktop, a tablet computer, a digital camera,a camcorder, a smartphone, a mobile device, and/or a wearable device.

Referring to FIG. 1, the image processing system 100 may include a firstimage sensor 110, a second image sensor 120, and an image processingdevice 130.

The first image sensor 110 may photograph all or part of a subject S.The first image sensor 110 may generate the captured result as firstimage data. The second image sensor 120 may photograph all or part ofthe subject S. The second image sensor 120 may generate the capturedresult as second image data. The first and second image sensors 110 and120 may transmit the first and second image data to the image processingdevice 130. Operations of the first and second image sensors 110 and 120may be controlled by the image processing device 130.

For example, each of the first and second image sensors 110 and 120 maybe implemented with one of a CCD sensor or a complementary metal-oxidesemiconductor (CMOS) sensor. A respective plurality of photodiodeelements may be integrated in each of the first and second image sensors110 and 120. When light is incident on the first and second imagessensors 110 and 120, ones of the photodiode elements may generateelectrons based on the amount of incident light. The first and secondimage sensors 110 and 120 may respectively generate the first and secondimage data based on the amounts of electrons thus generated. The imageprocessing system 100 illustrated in FIG. 1 includes two image sensors110 and 120. However, embodiments of the inventive concepts may not belimited thereto. For example, the image processing system 100 mayinclude three or more image sensors.

The image processing device 130 may include a first processor 131, asecond processor 132, a controller 133, a correction circuit 134, and amultiplexer 135.

According to some embodiments of the inventive concepts, the imageprocessing system 100 may include the first and second processors 131and 132. The first and second processors 131 and 132 may respectivelyprocess the first and second image data captured by the first and secondimage sensors 110 and 120. The first and second image data captured bythe first and second image sensors 110 and 120 may be different fromeach other.

The first processor 131 may receive the first image data from the firstimage sensor 110. For example, the first processor 131 may correct thefirst image data in units of a frame. In more detail, the firstprocessor 131 may eliminate noise included in the first image data. Toprevent image distortion generated when the first image data is outputto a display device, the first processor 131 may compensate for adistortion value in the first image data in advance. The first processor131 may correct a white balance of the first image data. The firstprocessor 131 may generate an output image by adjusting the size of anarea of the first image data.

The first processor 131 may control an operation of the first imagesensor 110. For example, the first processor 131 may control an open orclose operation of a shutter included in the first image sensor 110. Inmore detail, the first processor 131 may open the shutter of the firstimage sensor 110 until a brightness value of a subject image reaches areference value. The first processor 131 may control a location of afirst lens to adjust a focus between the first image sensor 110 and thesubject S.

A first image may be generated based on the first image data correctedby the first processor 131. The first processor 131 may transmit thefirst image to the controller 133, the correction circuit 134, and themultiplexer 135. An operation of the first processor 131 may becontrolled by the controller 133.

The second processor 132 may receive the second image data from thesecond image sensor 120. The second processor 132 may control anoperation of the second image sensor 120. The second processor 132 maycorrect the second image data. A second image may be generated based onthe second image data corrected by the second processor 132. The secondprocessor 132 may transmit the second image to the controller 133, thecorrection circuit 134, and the multiplexer 135. An operation of thesecond processor 132 may be similar to or the same as an operation ofthe first processor 131. A detailed description on an operating methodof the second processor 132 may be thus omitted for brevity.

The controller 133 may control overall operations of the imageprocessing device 130. For example, the controller 133 may individuallycontrol the operations of the first processor 131 and the secondprocessor 132. The controller 133 may receive the first image from thefirst processor 131 and the second image from the second processor 132.For example, the controller 133 may sense (or detect) the degree offocusing of each of the first and second image sensors 110 and 120 ormovement of the image processing system 100. Alternatively, thecontroller 133 may sense information about a zoom factor ZF of an outputimage OI.

The controller 133 may control an operation of the correction circuit134 based on the sensing result. The controller 133 may control awarping correction of an image performed by the correction circuit 134.The warping correction may include transforming a shape of an image intoanother shape. In more detail, the warping correction may includetransforming coordinates of each pixel included in an image intoreference coordinates. Respective coordinates may be transformedaccording to a location transform rule. For example, the locationtransform rule may use a homography or remapping manner. Coordinates ofthe pixels included in the image may be transformed into the referencecoordinates by using the location transform rule.

The degree of warping correction may be determined by a correctioncoefficient value used upon performing remapping or by a matrix used fora homography operation. For example, the degree of warping correctionmay increase as the correction coefficient value increases and thedegree of warping correction may decrease as the correction coefficientvalue becomes closer to “1”. Alternatively, the degree of warpingcorrection may be adjusted by changing ranks of a matrix and the warpingcorrection may not be performed when the matrix corresponds to anidentity matrix.

The controller 133 may control the correction circuit 134 such that thewarping correction may be made on an overlapped area between the firstimage and the second image. The controller 133 may control thecorrection circuit 134 to perform the warping correction on the secondimage based on the first image. Alternatively, the controller 133 maycontrol the correction circuit 134 to perform the warping correction onthe first image based on the second image.

The controller 133 may extract first reference coordinates fromcoordinates of pixels of the first image and may extract secondreference coordinates from coordinates of pixels of the second image.

According to some embodiments of the inventive concepts, the controller133 may control a time when the warping correction is made in thecorrection circuit 134. For example, the controller 133 may include atimer for controlling a time to make warping correction. Under controlof the controller 133, the warping correction may be made during areference time in the correction circuit 134. The controller 133 maystop an operation of the correction circuit 134 when the reference timeelapses.

In some embodiments, the controller 133 may count the number of framesof each of the first and second images. The controller 133 may include acounter circuit to count the number of frames of each of the first andsecond images.

For example, the controller 133 may count the number of frames of eachof the first and second images from a point in time when the warpingcorrection of the correction circuit 134 starts. Under control of thecontroller 133, the correction circuit 134 may perform the warpingcorrection until the number of frames of each of the first and secondimages reaches a reference count. The controller 133 may stop anoperation of the correction circuit 134 when the number of frames ofeach of the first and second images reaches the reference count.

The correction circuit 134 may receive the first image from the firstprocessor 131 and the second image from the second processor 132. Anoperation of the correction circuit 134 may be controlled by thecontroller 133.

The correction circuit 134 may receive information about the firstreference coordinates included in the first image and the secondreference coordinates included in the second image from the controller133. The correction circuit 134 may perform the warping correction onthe first image and the second image by using the first referencecoordinates and the second reference coordinates.

When the correction circuit 134 performs the warping correction on anoverlapped area between the first image and the second image, thecorrection circuit 134 may set one of the first image and the secondimage as a reference image. For example, the first image may be thereference image. The correction circuit 134 may extract referencecoordinates from an area of the first image that is overlapped with thesecond image and may extract reference coordinates from a correspondingarea of the second image that is overlapped with the first image. Thecorrection circuit 134 may correct locations of the referencecoordinates of the second image based on the reference coordinates ofthe first image.

When the correction circuit 134 makes the warping correction on thesecond image by using the first image, the correction circuit 134 maycorrect locations of the second reference coordinates of the secondimage based on the first reference coordinates of the first image. Whenthe correction circuit 134 makes the warping correction on the firstimage by using the second image, the correction circuit 134 may correctlocations of the first reference coordinates of the first image based onthe second reference coordinates of the second image. The correctioncircuit 134 may perform the warping correction during the referencetime. The correction circuit 134 may provide the multiplexer 135 with acorrection image generated through the warping correction.

The multiplexer 135 may receive the first image from the first processor131 and the second image from the second processor 132. The multiplexer135 may receive a corrected image from the correction circuit 134. Anoperation of the multiplexer 135 may be controlled by the controller133. The multiplexer 135, under control of the controller 133, mayselect one of the first image, the second image, and the correctionimage as the output image OI. The image processing system 100 mayprovide a user of the electronic device with the output image OI througha display of the electronic device. Alternatively, the image processingsystem 100 may transmit the output image OI to another electronicdevice.

The warping correction may be necessary to generate an output imagebased on images generated by the plurality of image sensors 110 and 120.However, when the image processing system 100 performs the warpingcorrection for a long time, the image processing system 100 may consumea lot of power in an operation process for the warping correction.According to some embodiments of the inventive concepts, the imageprocessing system 100 may perform the warping correction only during thereference time and may generate an output image without performing thewarping correction if the reference time elapses. According to someembodiments of the inventive concepts, the image processing system 100may reduce power consumption by shortening a warping correction time.

FIG. 2 is a conceptual block diagram illustrating operations of methodsin which a subject is photographed by first and second image sensors,according to some embodiments of the inventive concepts. Referring toFIGS. 1 and 2, each of the first image sensor 110 and the second imagesensor 120 may photograph the subject S. The first image sensor 110 maybe situated in a first direction d1, and the second image sensor 120 maybe situated in a second direction d2 that is opposite to the firstdirection d1. The first image sensor 110 and the second image sensor 120may be spaced apart from each other by a first distance D1.

Due to the physical distance D1 between the first image sensor 110 andthe second image sensor 120, the first image sensor 110 and the secondimage sensor 120 may photograph the subject S at different angles. Forexample, a first image I1 photographed by the first image sensor 110 mayinclude the subject S viewed from the first direction d1. A second imageI2 photographed by the second image sensor 120 may include the subject Sviewed from the second direction d2. Accordingly, a location of thesubject S included in the first image I1 may be different from alocation of the subject S included in the second image I2.

FIG. 3 is a flowchart illustrating operations of methods of operatingthe image processing system of FIG. 1, according to some embodiments ofthe inventive concepts. Referring to FIGS. 1 to 3, in an operation S110,the image processing system 100 may generate a first image and a secondimage. For example, the first image described with reference to FIG. 1may be the same as the first image I1 illustrated in FIG. 2, and thesecond image described with reference to FIG. 1 may be the same as thesecond image I2 illustrated in FIG. 2. In an operation S120, the imageprocessing system 100 may select the first image or the second image asan output image.

In an operation S130, the image processing system 100 may generate acorrection image based on first reference coordinates of the first imageand second reference coordinates of the second image. For example, thefirst reference coordinates of the first image may be set based oncoordinates of pixels of the first image, and the second referencecoordinates of the second image may be set based on coordinates ofpixels of the second image. The correction circuit 134 may set one ofthe first and second images as a reference image and may correctlocations of reference coordinates of another image based on referencecoordinates of the reference image.

In an operation S140, the image processing system 100 may determinewhether a correction time exceeds a reference time. If the correctiontime does not exceed the reference time (No), the process may proceed tooperation S130 to perform the process of generating the correction imageagain. If the correction time exceeds the reference time (Yes), in anoperation S150, the image processing system 100 may stop the warpingcorrection. For example, the image processing system 100 may reduce aconversion coefficient value needed for the warping correction whileperforming the warping correction.

FIG. 4 is a conceptual block diagram illustrating operations of methodsin which a subject is photographed by first and second image sensors,according to some embodiments of the inventive concepts. Referring toFIGS. 1 and 4, in some embodiments, the first image sensor 110 mayphotograph the subject S by using a wide angle lens. The wide angle lensmay have a wide angle of view. For example, an angle of view of ageneral lens may be from about 44° to about 50°, and an angle of view ofthe wide angle lens may be from about 60° to about 80°. However,embodiments of the inventive concepts are not limited thereto. Forexample, in some embodiments, the angle of view of the wide angle lensmay be wider than 80°. The first image sensor 110 may photograph a firstarea A1 of the subject S. For example, the first area A1 may be the sameas the whole area of the subject S, however embodiments of the inventiveconcepts are not limited thereto.

In some embodiments, the second image sensor 120 may photograph thesubject S by using a telephoto lens. The telephoto lens may have anangle of view narrower than that of the wide angle lens. For example, insome embodiments, the angle of view of the telephoto lens may be lessthan 15°, however embodiments of the inventive concepts are not limitedthereto. Accordingly, the second image sensor 120 may photograph asecond area A2 of the subject S. The second area A2 may be a portion ofthe whole area of the subject S. The second area A2 may be smaller thanthe first area A1.

The first image sensor 110 may be situated in the first direction d1,and the second image sensor 120 may be situated in the second directiond2 that is opposite to the first direction d1. The first image sensor110 and the second image sensor 120 may be spaced apart from each otherby a second distance D2.

Due to the physical distance D2 between the first image sensor 110 andthe second image sensor 120, the first image sensor 110 and the secondimage sensor 120 may photograph the subject S at different angles. Thefirst image sensor 110 may generate subject S of the first area A1viewed from the first direction d1 as the first image I1. The secondimage sensor 120 may generate subject of the second area A2 viewed fromthe second direction D2 as the second image I2.

Image sensors 110 and 120 having different angles of view may be used inthe image processing system 100 may provide a clear image consistentlywhen a zoom factor of a subject included in an output image is changed.A method in which the image processing system 100 generates an outputimage when a zoom factor of a subject included in the output image ischanged will be more fully described with reference to FIGS. 5 to 7.

FIG. 5 is a conceptual block diagram illustrating operations of methodsof generating an output image at the image processing system of FIG. 1when a zoom factor of a subject included in the output image increases,according to some embodiments of the inventive concepts. Referring toFIG. 5, the size of a subject included in the output image OI may becomeenlarged (or zoomed in) as the zoom factor ZF increases. Even though thezoom factor ZF increases, the size of the output image may be maintainedwithout change.

Referring to FIGS. 1, 4, and 5, the controller 133 may obtaininformation about the zoom factor ZF. When the zoom factor ZF is “1”,the first image I1 photographed by the first image sensor 110 may beoutputted as the output image OI. For example, the controller 133 mayactivate the first image sensor 110 and may deactivate the second imagesensor 120. When the first image sensor 110 is activated, the firstimage sensor 110 may photograph the subject S. When the second imagesensor 120 is deactivated, the second image sensor 120 may notphotograph the subject S. Alternatively, the first and second imagesensors may each photograph the subject S, and the controller 133 maycontrol the multiplexer 135 to output the first image I1 as the outputimage OI.

A subject included in the first image I1 may be enlarged in proportionto an increase of the zoom factor ZF of the output image OI. Forexample, the controller 133 may control the first processor 131 toenlarge the subject. The first processor 131 may enlarge the subjectincluded in the first image I1 based on the zoom factor ZF. The firstprocessor 131 may enlarge a first image area a1 of the first image I1when the zoom factor ZF reaches a first reference value rv1. Forexample, the first processor 131 may enlarge the first image area a1 tobe the same as the size of the output image OI. The enlarged first imagearea a1 may be generated as the output image OI. The size of the firstimage area a1 of the first image I1 may become smaller as the zoomfactor ZF approximates to a second reference value rv2.

When the zoom factor ZF reaches the second reference value rv2, theoutput image OI may be generated based on the second image I2photographed by the second image sensor 120 instead of the first imageI1 photographed by the first image sensor 110. For example, thecontroller 133 may deactivate the first image sensor 110 and mayactivate the second image sensor 120. The first image sensor 110 may notphotograph the subject S when the first image sensor 110 is deactivated.The second image sensor 120 may photograph the subject S when the secondimage sensor 120 is activated.

When the zoom factor ZF reaches the second reference value rv2, an imageof the enlarged second area A2 of the second image sensor 120 may begenerated as the output image OI. A quality of the output image OI maybe worse when the output image OI is generated based on an enlargedsubject of the first image I1, as compared to when the output image OIis generated based on the enlarged subject of the second image I2, whenthe zoom factor ZF reaches the second reference value rv2. In otherwords, when the zoom factor becomes large enough that the area to beenlarged is the same as or smaller than the area A2 of the second imagesensor 120, the quality of the output may be improved by generating theoutput image OI based on the second image sensor 120 that has a narrowerangle of view than the first image sensor 120. Accordingly, when thezoom factor ZF reaches the second reference value rv2, the imageprocessing device 130 may generate the output image OI by using thesecond image I2 instead of the first image I1. Alternatively, the firstand second image sensors 110 and 120 may photograph the subject S, andthe controller 133 may control the correction circuit 134 to generatethe output image OI based on the second image I2.

Referring to FIGS. 4 and 5, a direction to photograph the first area A1of the first image sensor 110 may be different from a direction tophotograph the second area A2 of the second image sensor 120.Accordingly, a location of a subject included in the output image OI maybe changed if the second image I2 photographed by the second imagesensor 120 is directly output as the output image OI. To prevent achange in a location of the subject, the correction circuit 134 mayperform the warping correction on the second image I2.

In more detail, the controller 133 may allow the correction circuit 134to perform the warping correction when the zoom factor ZF reaches thesecond reference value rv2. The controller 133 may provide thecorrection circuit 134 with information about first referencecoordinates of the first image and second reference coordinates of thesecond image. The correction circuit 134 may correct locations of thesecond reference coordinates of the second image I2 based on the firstreference coordinates of the first image I1. With the above-describedprocess, a location of a subject in the output image OI may not bechanged even though the subject is enlarged in proportion to an increaseof the zoom factor ZF. In this case, electric energy consumed by theimage processing system 100 may increase.

The second processor 132 may enlarge a subject included in the secondimage I2 based on the zoom factor ZF. The second processor 132 mayenlarge a second image area a2 of the second image I2 when the zoomfactor ZF reaches a third reference value rv3. For example, the secondprocessor 132 may enlarge the second image area a2 to be the same as thesize of the output image OI.

The correction circuit 134 may correct locations of referencecoordinates of the second image area a2 based on the referencecoordinates of the first image I1. The corrected second image area a2may be generated as the output image OI. With the above-describedprocess, a location of a subject in the output image OI may not bechanged even though the subject is enlarged. The size of the secondimage area a2 of the second image I2 may become smaller as the zoomfactor ZF approximates to a fourth reference value rv4. The degree ofwarping correction may decrease as the zoom factor ZF approximates tothe fourth reference value rv4 from the second reference value rv2. Forexample, a correction coefficient value needed for the warpingcorrection may approximate to “1”, or a matrix may become an identitymatrix.

The second processor 132 may enlarge a subject included in the secondimage area a2 of the second image I2 when the zoom factor ZF reaches thefourth reference value rv4. For example, the second processor 132 mayenlarge the second image area a2 to be the same as the size of theoutput image OI. The correction circuit 134 may not perform the warpingcorrection on the enlarged second image area a2. The enlarged secondimage area a2 may be output as the output image OI. With theabove-described process, a location of a subject in the output image OImay be changed. To correct the location change, the correction circuit134 may perform translation correction or crop correction on the secondimage area a2. Electric energy consumed by the image processing system100 may decrease.

A kind of an image sensor that photographs a subject may be changed whenthe zoom factor ZF of the subject included in the output image OIincreases. The image processing system 100 may perform the warpingcorrection on the images I1 and I2 when a kind of an image sensor thatphotographs a subject is changed. However, in the case where the imageprocessing system 100 performs the warping correction for a long time,the image processing system 100 may consume a lot of power. To reducepower consumption, according to some embodiments of the inventiveconcepts, the image processing system 100 may not perform the warpingcorrection when the zoom factor ZF reaches a reference value.Accordingly, the power efficiency of the image processing system 100 maybe improved.

In other words, as the zoom factor increases, when the zoom factorbecomes equal to the second reference value rv2, the image processingsystem 100 may change from generating the output image OI based on thefirst image I1 to the second image I2 for improved quality because ofthe narrower angle of view of the second image sensor 120. However, whenthe zoom factor becomes equal to the second reference value rv2 and theoutput image OI is generated based on the second image I2, thecorrection circuit 134 may perform the warping correction on the secondimage I2. As the zoom factor increases further to approach the thirdreference value rv3, the degree of warping correction may decrease. Asthe zoom factor increases further to approach the fourth reference valuerv4, the warping correction may cease.

FIG. 6 is a conceptual block diagram illustrating operations of methodsof generating an output image at the image processing system of FIG. 1when a zoom factor of a subject included in the output image decreases,according to some embodiments of the inventive concepts. A value of thezoom factor ZF may decrease when a size of a subject included in theoutput image OI is reduced (or zoomed out).

Referring to FIGS. 1, 4, and 6, when the zoom factor ZF is equal to thefourth reference value rv4, the second processor 132 of the imageprocessing device 130 may generate the output image OI based on thesecond image area a2 of the second image I2. For example, the secondprocessor 132 may enlarge the second image area a2 to be the same as thesize of the output image OI. The enlarged second image area a2 may beoutput as the output image OI.

In the second image I2, the size of the second image area a2 may becomelarger as the zoom factor ZF becomes smaller than the fourth referencevalue rv4. For example, as the zoom factor ZF approximates to the thirdreference value rv3, the size of the second image area a2 may becomelarger, and a magnification of the second image area a2 may becomesmaller. The second processor 132 may enlarge the second image area a2to be the same as the size of the output image OI.

The correction circuit 134 may correct locations of referencecoordinates of the enlarged second image area a2 based on the referencecoordinates of the first image I1. The corrected second image area a2may be generated as the output image OI. With the above-describedprocess, a location of a subject in the output image OI may be changed.

The second image area a2 may become larger as the zoom factor ZFapproximates to the second reference value rv2. When the zoom factor ZFreaches the second reference value rv2, the size of the second imagearea a2 may become the same as the size of the second image I2photographed by the second image sensor 120. The second processor 132may not enlarge the second image I2 any more. The correction circuit 134may correct locations of reference coordinates of the second image areaI2 based on the reference coordinates of the first image I1. Thecorrected second image I2 may be generated as the output image OI.

When the zoom factor ZF becomes smaller than the second reference valuerv2, the output image OI may be generated based on the first image I1photographed by the first image sensor 110 instead of the second imageI2 photographed by the second image sensor 120. The first processor 131may enlarge a subject included in the first image area a1 of the firstimage I1 when the zoom factor ZF reaches the first reference value rv1.For example, the first processor 131 may enlarge the first image area a1to be the same as the size of the output image OI. The enlarged firstimage area a1 may be generated as the output image OI. The size of thefirst image area a1 of the first image I1 may become larger as the zoomfactor ZF approximates to “1”. Lastly, when the zoom factor ZF is “1”,the first image I1 photographed by the first image sensor 110 may begenerated as the output image OI.

In other words, when the zoom factor is equal to the fourth referencevalue rv4 the image processing system 100 may generate the output imageOI based on the second image I2 without warping correction. As the zoomfactor decreases to approach the third reference value rv3, the imageprocessing system 100 may generate the output image OI based on thesecond image I2 with warping correction. As the zoom factor decreasesfurther to become smaller than the second reference value rv2, the imageprocessing system 100 may change from generating the output image OIbased on the second image I2 to the first image I1 and the warpingcorrection may cease.

FIG. 7 is a flowchart illustrating operations of methods of enlarging asubject included in an image at the image processing system of FIG. 1,according to some embodiments of the inventive concepts. Referring toFIGS. 1, 4, 5, and 7, in an operation S210, the image processing system100 may generate the output image OI based on the first image I1. In anoperation S220, a subject included in the first image I1 may beenlarged. The zoom factor ZF may become greater as the subject of thefirst image I1 is enlarged.

In an operation S230, the image processing system 100 may determinewhether the zoom factor ZF is not less than the second reference valuerv2. If the zoom factor ZF is less than the second reference value rv2(No), the process may proceed back to the operation S220 to repeat theprocess of enlarging the subject of the first image I1. If the zoomfactor ZF is not less than the second reference value rv2 (Yes), in anoperation S240, the image processing system 100 may generate the outputimage OI based on a correction image that is generated by correcting thefirst image and the second image. The image processing system 100 maygenerate the correction image by correcting locations of referencecoordinates of the second image based on the reference coordinates ofthe first image. The correction image may be generated as the outputimage OI.

In an operation S250, the image processing system 100 may determinewhether the zoom factor ZF is not less than the fourth reference valuerv4. If the zoom factor ZF is less than the fourth reference value rv4(No), the process may proceed back to the operation S240 to repeat theprocess of generating the correction image. If the zoom factor ZF is notless than the fourth reference value rv4 (Yes), in an operation S260,the image processing system 100 may stop the correction operation andmay generate the output image OI based on the second image I2.

FIG. 8 is a block diagram illustrating an image processing system,according to some embodiments of the inventive concepts. Referring toFIG. 8, an image processing system 200 may include a first image sensor210, a second image sensor 220, a third image sensor 230, and an imageprocessing device 240. The first image sensor 210, the second imagesensor 220, and the third image sensor 230 will be described withreference to FIG. 9.

FIG. 9 is a conceptual block diagram illustrating operations of methodsin which a subject is photographed by first to third image sensors,according to some embodiments of the inventive concepts. Referring toFIGS. 8 and 9, the first to third image sensors 210 to 230 may bearranged to be spaced apart from each other by the same distance D. Forexample, the first image sensor 210 may be situated in the firstdirection d1, and the third image sensor 230 may be situated in thesecond direction d2 that is opposite to the first direction d1. Thesecond image sensor 220 may be situated between the first image sensor210 and the third image sensor 230.

Since the first to third image sensors 210 to 230 are spaced apart fromeach other by the physical distance D, the first to third image sensors210 to 230 may respectively photograph subjects S1 to S3 at differentangles. For example, the first image sensor 210 may photograph a firstarea B1 including a first subject S1 and a portion S2_1 of a secondsubject S2. The second image sensor 220 may photograph a second area B2including the second subject S2. The third image sensor 230 mayphotograph a third area B3 including a third subject S3 and a portionS2_2 of the second subject S2.

Returning to FIG. 8, the first to third image sensors 210 to 230 mayrespectively generate first to third image data based on thephotographing results. The first to third image data may be transmittedto the image processing device 240.

The image processing device 240 may include a first processor 241, asecond processor 242, a third processor 243, a controller 244, acorrection circuit 245, and a multiplexer 246. The first, second, andthird processors 241, 242, and 243 may respectively receive first,second, and third image data. The first, second, and third processors241, 242, and 243 may respectively eliminate noise of first, second, andthird image data and may correct a distortion values and white balancethereof.

The first processor 241 may correct the first image data to generate afirst image, and the second processor 242 may correct the second imagedata to generate the second image. The third processor 243 may correctthe third image data to generate the third image. Each of the first tothird processors 241 to 243 may transmit the corresponding image to thecontroller 244, the correction circuit 245, and the multiplexer 246.

The controller 244 may control overall operations of the imageprocessing device 240. The controller 244 may receive first, second, andthird image data from the first, second, and third processors 241, 242,and 243, respectively. The controller 244 may sense (or detect) thedegree of focusing of the first image sensor 210, the second imagesensor 220, or the third image sensor 230 or movement of the imageprocessing system 200. Alternatively, the controller 244 may senseinformation about the zoom factor ZF of the output image OI.

The controller 244 may control the correction circuit 245 whenphotographing switching occurs between the first to third image sensors210 to 230. For example, the controller 244 may control warpingcorrection of an image that is performed by the correction circuit 245.For example, the controller 244 may provide the correction circuit 245with information about first reference coordinates of the first image,second reference coordinates of the second image, and third referencecoordinates of the third image. The first reference coordinates of thefirst image may be set based on coordinates of pixels of the firstimage. The second reference coordinates of the second image may be setbased on coordinates of pixels of the second image. The third referencecoordinates of the third image may be set based on coordinates of pixelsof the third image.

The controller 244 may control a time when the warping correction ismade in the correction circuit 245. For example, the controller 244 mayinclude a timer for controlling a time to make warping correction. Undercontrol of the controller 244, the warping correction may be made duringa reference time in the correction circuit 245. The controller 244 maystop an operation of the correction circuit 245 when the reference timeelapses.

Alternatively, the controller 244 may count the number of frames of eachof the received first and second images. The controller 244 may includea counter circuit to count the number of frames of each of the first andsecond images.

For example, when photographing switching occurs between the first tothird image sensors 210 to 230, the controller 244 may count the numberof frames of each of the first to third images from a point in time whenthe warping correction of the correction circuit 245 starts. Undercontrol of the controller 244, the correction circuit 245 may performthe warping correction until the number of frames of each of the firstto third images reaches a reference count. The controller 244 may stopan operation of the correction circuit 245 when the number of frames ofeach of the first and second images reaches the reference count.

The correction circuit 245 may perform the warping correction on thefirst to third images under control of the controller 244. Thecorrection circuit 245 may perform the warping correction by using thefirst to third reference coordinates of the first to third images. Animage correcting method that is performed by the correction circuit 245will be described with reference to FIGS. 10 to 14.

FIG. 10 is a conceptual flowchart diagram illustrating operations ofmethods in which the image processing system of FIG. 8 corrects a firstimage, according to some embodiments of the inventive concepts. When thecorrection circuit 245 generates the output image OI based on first tothird images, the correction circuit 245 may correct the first to thirdimages as one image.

Referring to FIG. 10, a first image J1 photographed by the first imagesensor 210 and a second image J2 photographed by the second image sensor220 may be partially overlapped. The first image J1 and the second imageJ2 may be photographed at different angles. For this reason, a portionS2_1 of the second subject S2 included in the first image J1 and theportion S2_1 of the second subject S2 included in the second image J2may not be matched with each other. The correction circuit 245 mayperform the warping correction for matching with the portion S2_1 of thesecond subject S2 included in an overlapped area. For example, thecorrection circuit 245 may perform the warping correction on the firstimage J1 based on the second image J2. This is only an example, and thecorrection circuit 245 may perform the warping correction on the secondimage J2 based on the first image J1.

For example, an area of the first image J1, which is overlapped with thesecond image J2, may be defined by first reference coordinates “a”, “b”,“c”, and “d”. An area of the second image J2, which is overlapped withthe first image J1, may be defined by second reference coordinates “A”,“B”, “C”, and “D”. In each of the first and second images J1 and J2, anoverlapped area may be defined by four coordinates. This is only anexample, and an overlapped area may be defined by five or morecoordinates in each of the first and second images J1 and J2.

To perform the warping correction, the correction circuit 245 may movethe first reference coordinates “a”, “b”, “c”, and “d” of the firstimage J1 to the second reference coordinates “A”, “B”, “C”, and “D” ofthe second image J2, respectively. The correction circuit 245 maycorrect the first image J1 to generate a corrected first image J1′. Inthis case, the portion S2_1 of the second subject S2 included in thecorrected first image J1′ and the portion S2_1 of the second subject S2included in the second image J2 may be matched with each other.

FIG. 11 is a conceptual flowchart diagram illustrating operations ofmethods in which the image processing system of FIG. 8 corrects a secondimage, according to some embodiments of the inventive concepts.Referring to FIG. 11, the second image J2 and a third image J3photographed by the third image sensor 230 may be partially overlapped.The second image J2 and the third image J3 may be photographed atdifferent angles. For this reason, a portion S2_2 of the second subjectS2 included in the second image J2 and the portion S2_2 of the secondsubject S2 included in the third image J3 may not be matched with eachother. The correction circuit 245 may perform the warping correction formatching with the portion S2_2 of the second subject S2 included in anoverlapped area. For example, the correction circuit 245 may perform thewarping correction on the third image J3 based on the second image J2.This is only an example, and the correction circuit 245 may perform thewarping correction on the second image J2 based on the third image J3.

For example, an area of the third image J3, which is overlapped with thesecond image J2, may be defined by third reference coordinates “e”, “f”,“g”, and “h”. For example, an area of the second image J2, which isoverlapped with the third image J3, may be defined by fourth referencecoordinates “E”, “F”, “G”, and “H”. In each of the second and thirdimages J2 and J3, an overlapped area may be defined by four coordinates.This is only an example, and an overlapped area may be defined by fiveor more coordinates in each of the second and third images J2 and J3.

To perform the warping correction, the correction circuit 245 may movethe third reference coordinates “e”, “f”, “g”, and “h” of the thirdimage J3 to the fourth reference coordinates “E”, “F”, “G”, and “H” ofthe second image J2, respectively. The correction circuit 245 maycorrect the third image J3 to generate a corrected third image J3′. Inthis case, the portion S2_2 of the second subject S2 included in thecorrected third image J3′ and the portion S2_2 of the second subject S2included in the second image J2 may be matched with each other.

FIG. 12 is a conceptual flowchart diagram illustrating operations ofmethods in which an output image is generated by the image processingsystem of FIG. 8, according to some embodiments of the inventiveconcepts. Referring to FIGS. 10 to 12, the correction circuit 245 maygenerate one output image OI based on the corrected first image J1′, thesecond image J2, and the corrected third image J3′. Electric energyconsumed by the image processing system 200 in the warping correctionmay increase.

Returning to FIG. 8, photographing of some of the first to third imagesensors 210 to 230 may be interrupted. For example, the controller 244may selectively receive an image(s) from the first to third imagesensors 210 to 230 when a user request is received or when photographingswitching occurs between the first to third image sensors 210 to 230. Anoperating method of the image processing system 100 when photographingof some of the first to third image sensors 210 to 230 is interruptedwill be described with reference to FIGS. 13 and 14.

FIG. 13 is a conceptual block diagram illustrating operations of imagephotographing methods of third image sensor methods in the imageprocessing system of FIG. 8, according to some embodiments of theinventive concepts. FIG. 14 is a conceptual flowchart diagramillustrating operations of methods in which the image processing systemof FIG. 8 generates an output image, according to some embodiments ofthe inventive concepts. Referring to FIGS. 9 and 13, the first andsecond image sensors 210 and 220 may not perform photographing, and onlythe third image sensor 230 may perform photographing. The third imagesensor 230 may photograph the portion of a second subject S2_2 and thethird subject S3.

Referring to FIG. 14, the correction circuit 245 may correct the thirdimage J3 based on the second image J2 to generate the corrected thirdimage J3′. A method in which the correction circuit 245 generates thecorrected third image J3′ may be similar to or the same as the methoddescribed with reference to FIG. 11. A detailed description on themethod in which the correction circuit 245 generates the corrected thirdimage J3′ may be thus omitted. The corrected third image J3′ may begenerated as the output image OI.

Photographing of the first and second image sensors 210 and 220 may beinterrupted while the output image OI is generated based on first tothird images photographed by the first to third image sensors 210 to230. A location of a subject (e.g., the portion S2_2 of the secondsubject) included in the output image OI may be changed when the thirdimage J3 is directly outputted as the output image OI without thewarping correction. To prevent a location change of the subject, thecorrection circuit 245 may perform the corrected third image J3′ as theoutput image OI. The correction circuit 245 may perform the warpingcorrection on the third image J3 during a first time.

In this case, electric energy consumed by the image processing system100 may be smaller than electric energy consumed when one output imageOI is generated based on the corrected first image J1′, the second imageJ2, and the corrected third image J3′. However, a lot of electric energymay be still consumed by the image processing system 200. After thefirst time, the correction circuit 245 may output the third image J3 asthe output image OI. If the warping correction is interrupted, electricenergy consumed by the image processing system 200 may decrease.

Returning to FIG. 8, the correction circuit 245 may perform the warpingcorrection in the same method as that described with reference to 14.The correction circuit 245 may transmit a corrected image to themultiplexer 246.

The multiplexer 246 may receive first, second, and third image data fromthe first, second, and third processors 241, 242, and 243, respectively.The multiplexer 246 may receive the corrected image from the correctioncircuit 245. The multiplexer 246 may select one of the first image, thesecond image, and the correction image as the output image OI undercontrol of the controller 244.

According to some embodiments of the inventive concepts, the imageprocessing system 200 may perform the warping correction only during thereference time and may generate an output image without performing thewarping correction if the reference time elapses. According to someembodiments of the inventive concepts, the image processing system 200may reduce power consumption by shortening a warping correction time.

FIG. 15 is a block diagram illustrating an electronic device includingan image processing system, according to some embodiments of theinventive concepts. An electronic device 1000 may be a smartphone.However, embodiments of the inventive concepts are not limited thereto.For example, the electronic device 1000 may be one of a cellular phone,a tablet PC, a notebook computer, a digital camera, a smart ring, and asmart watch. Referring to FIG. 15, the electronic device 1000 mayinclude two image sensors 1100 and 1200. For example, the first imagesensor 1100 may photograph a subject by using an wide angle lens, andthe second image sensor 1200 may photograph the subject by using atelephoto lens.

The electronic device 1000 may include an image processing device 1300for processing images photographed by the first and second image sensors1100 and 1200. The image processing device 1300 may process the imagesbased on the devices and methods described with reference to one or moreof FIGS. 1 to 14.

According to some embodiments of the inventive concepts, the electronicdevice 1000 may perform the warping correction only during a referencetime and may generate an output image without performing the warpingcorrection if the reference time elapses. According to some embodimentsof the inventive concepts, the electronic device 1000 may reduce powerconsumption by shortening a warping correction time.

According to some embodiments of the inventive concepts, in an imageprocessing system and an electronic device including the same, powerconsumption of the electronic device may be reduced by reducingcomputation needed to correct photographed images, and thus powerefficiency may be improved.

While the inventive concepts have been described with reference to someembodiments, various changes and modifications may be made withoutdeparting from the inventive concepts. Therefore, the above embodimentsare not limiting, but illustrative.

What is claimed is:
 1. An image processing system comprising: a firstimage sensor configured to obtain first image data of a subject; asecond image sensor configured to obtain second image data of all orpart of the subject; and an image processing device configured toperform operations comprising: obtaining a first image and a secondimage by respectively processing the first image data and the secondimage data; generating a correction image by correcting locations ofsecond reference coordinates of the second image based on firstreference coordinates of the first image, when a zoom factor is betweena first reference value and a second reference value; and outputting anoutput image based on the second image when the zoom factor exceeds thesecond reference value, based on the correction image when the zoomfactor is between the first reference value and the second referencevalue, and based on the first image when the zoom factor is less thanthe first reference value.
 2. The image processing system of claim 1,wherein the first image sensor is configured to obtain the first imagedata using an wide angle lens.
 3. The image processing system of claim1, wherein the second image sensor is configured to obtain the secondimage data using a telephoto lens.
 4. The image processing system ofclaim 1, wherein the operations of the image processing device furthercomprise: correcting locations of the second reference coordinates ofthe second image based on the first reference coordinates of the firstimage using a correction coefficient value; and decreasing thecorrection coefficient value when the zoom factor approximates to thesecond reference value from the first reference value.
 5. The imageprocessing system of claim 1, wherein the first reference coordinates ofthe first image are based on coordinates of pixels of the first image,and wherein the second reference coordinates of the second image arebased on coordinates of pixels of the second image.
 6. The imageprocessing system of claim 1, wherein, when performing the operations,the image processing device is configured to consume a first amount ofelectric power when the zoom factor of the output image is between thefirst reference value and the second reference value.
 7. The imageprocessing system of claim 6, wherein, when performing the operations,the image processing device is configured to consume a second amount ofelectric power that is smaller than the first amount of electric powerwhen the zoom factor of the output image exceeds the second referencevalue.
 8. An electronic device comprising: a first image sensorconfigured to obtain first image data of a subject; a second imagesensor configured to obtain second image data of the subject; and animage processing device configured to perform operations comprising:obtaining a first image and a second image by respectively processingthe first image data and the second image data; outputting a correctionimage that is generated by correcting locations of second referencecoordinates of the second image based on first reference coordinates ofthe first image during a first time, when the first image data is notreceived; and outputting an output image based on the second image afterthe first time without correcting the locations of second referencecoordinates of the second image based on first reference coordinates ofthe first image.
 9. The electronic device of claim 8, wherein, whenperforming the operations, the image processing device is configured toconsume a first amount of electric power during the first time when thecorrection image is generated and output, and wherein, when performingthe operations, the image processing device is configured to consume asecond amount of electric power that is different from the first amountof electric power after the first time when the output image is outputbased on the second image without correcting the locations of secondreference coordinates of the second image based on first referencecoordinates of the first image.
 10. The electronic device of claim 9,wherein the first amount of electric power is greater than the secondamount of electric power.
 11. The electronic device of claim 8, furthercomprising: a third image sensor configured to obtain third image dataof the subject, wherein the operations of the image processing devicefurther comprise obtaining a third image by processing the third imagedata.
 12. The electronic device of claim 11, wherein the operations ofthe image processing device further comprise: outputting a second outputimage based on the first image, the correction image that is generatedby correcting the locations of the second reference coordinates of thesecond image based on the first reference coordinates of the firstimage, and a second correction image that is generated by correctinglocations of third reference coordinates of the third image based onfourth reference coordinates of the first image, outputting the secondcorrection image that is generated by correcting the locations of thethird reference coordinates of the third image based on the fourthreference coordinates of the first image during a second time, when thefirst image data and the second image data are not received by the imageprocessing device; and outputting a third output image based on thethird image after the second time without correcting the locations ofthe third reference coordinates of the third image based on the fourthreference coordinates of the first image.
 13. The electronic device ofclaim 12, wherein, when performing the operations, the image processingdevice is configured to consume a first amount of electric power whilethe second output image is generated based on the first image, thecorrection image, and the second correction image, wherein, whenperforming the operations, the image processing device is configured toconsume a second amount of electric power during the second time whenthe second correction image is generated and output, and wherein, whenperforming the operations, the image processing device is configured toconsume a third amount of electric power after the second time when thethird output image is output based on the third image without correctingthe locations of the third reference coordinates of the third imagebased on the fourth reference coordinates of the first image.
 14. Theelectronic device of claim 13, wherein the second amount of electricpower is greater than the third amount of electric power and the firstamount of electric power is greater than the second amount of electricpower.
 15. The electronic device of claim 12, wherein the firstreference coordinates and the fourth reference coordinates of the firstimage are based on coordinates of pixels of the first image, wherein thesecond reference coordinates of the second image are based oncoordinates of pixels of the second image, and wherein the thirdreference coordinates of the third image are based on coordinates ofpixels of the third image.
 16. An image processing system comprising: afirst image sensor configured to obtain first image data of a subject; asecond image sensor physically separated from the first image sensor bya distance, the second image sensor being configured to obtain secondimage data of the subject; a first image processor coupled to the firstimage sensor and configured produce a first image based on the firstimage data; a second image processor coupled to the second image sensorand configured produce a second image based on the second image data; acorrection circuit that is configured to receive the first and secondimages and to produce a corrected image by transforming coordinates ofthe second image based on reference coordinates of the first image; anda controller that is configured to control the image processing systemto enable the correction circuit and output the corrected image as anoutput image in a first time and then to disable the correction circuitand output the second image as the output image in a second time. 17.The image processing system of claim 16, wherein the first imageprocessor is configured to produce the first image by enlarging aportion of the first image data based on a zoom factor; wherein thesecond image processor is configured to produce the second image byenlarging a portion of the second image data based on the zoom factor;and when the controller is configured to transition from the first timeto the second time when the zoom factor exceeds a threshold value. 18.The image processing system of claim 17, wherein the correction circuitis configured to decrease a degree of warping correction during thefirst time in proportion to an increase of the zoom factor.
 19. Theimage processing system of claim 16, wherein the controller isconfigured to transition from the first time to the second time after anexpiration of a predetermined duration of time.
 20. The image processingsystem of claim 19, wherein the correction circuit is configured todecrease a degree of warping correction during the first time.